For the second time in six months, Ottawa delayed Tuesday the implementation of new rules requiring visa-exempt foreign nationals who fly or transit through Canada to obtain an electronic travel authorization (eTA).

A leniency period had been in effect since mid-March, when the new regulations were rolled out, due to technical glitches.

That was scheduled to end on September 30, but the government announced an extension to November 10 in order "to give travellers and airlines more time to prepare for changes," said a statement.

Thereafter, officials are supposed to begin strictly enforcing the rules.

Immigration Minister John McCallum said the new delay aimed "to minimize any travel disruptions."

A large part of the problem was a lack of public knowledge about the new rules, McCallum said, pledging "another major information blitz in Canada and abroad to encourage affected travellers... to plan ahead and get the necessary travel documents before they book a flight to Canada."

U.S. citizens are exempted.

Other foreign nationals, including those passing through on a stopover, must fill out an online eTA in advance of their trip, and pay an administrative fee of CDN$7 (US$5.29).

After completing the online form, permission to travel to Canada will be sent by email and will remain in effect for five years.

"Most applicants get approved within minutes,". "However, some applications can take several days to process so don't wait until the last minute."

The measure is similar to one set up by the United States in 2008, and will affect more than three million travelers per year from more than 50 countries.